CN218755341U - Comprehensive treatment system for hydrocarbon organic polluted underground water - Google Patents

Abstract

The utility model belongs to the technical field of sewage treatment, concretely relates to comprehensive treatment system of hydrocarbon organic pollution groundwater, including sewage treatment module, sludge treatment module and offeing medicine module, sewage treatment module is used for the water to handle, and sludge treatment module is used for sludge treatment, and offeing medicine module is arranged in carrying out the medicine to each cell body in the sewage treatment module and puts in. The utility model discloses a suspended solid of air supporting pond in with groundwater separates, and the fenton reaction tank turns into macromolecule, the material that is difficult to biodegradable into the inorganic matter, and the sedimentation tank makes the sewage tiny particle agglomerate into the large granule each other and carries out solid-liquid separation fast, and the sewage after the sedimentation tank is handled flows to middle pond and carries out the pH regulation back, passes through sand filtration, charcoal filtration again and handles, gets rid of the remaining micro pollutant in the aquatic. The utility model discloses a multiple cell body realizes adopting multiple repair technology combination of preliminary treatment, advanced oxidation, biochemical treatment to organic pollution groundwater, promotes the restoration effect to organic pollution groundwater.

Description

Comprehensive treatment system for hydrocarbon organic polluted underground water

Technical Field

The utility model belongs to the technical field of sewage treatment, concretely relates to hydrocarbon organic pollution groundwater integrated processing system.

Background

Groundwater refers to water present in the rock voids below the ground, and in the narrower sense, water in a saturated aquifer below the surface of the groundwater. In the national standard hydrogeological terminology (GB/T14157-93), groundwater refers to various forms of gravitational water buried below the surface of the earth. Groundwater is an important component of water resources. However, with the development of industry, the discharge of industrial waste water causes the water containing toxic organic matters to permeate into underground groundwater, thereby causing groundwater pollution. In the processes of oil exploitation, storage, transportation, processing, petrochemical production, gathering and transportation and the like, oil leakage, sudden leakage accidents, unreasonable discharge of oily wastewater and the like cause a large amount of petroleum hydrocarbons to enter a groundwater system, and the petroleum hydrocarbons contain various toxic substances such as alkane, cycloalkane, aromatic hydrocarbon and the like and become the most common pollutants in groundwater organic pollution. The hydrocarbon organic pollutants in underground water have the following hazards: organic contaminants in groundwater often cause "triproducive" effects (carcinogenic, teratogenic, mutagenic); volatile organic pollutants (such as benzene, naphthalene, halogenated hydrocarbon and the like) are harmful greatly, acute poisoning mainly acts on a human nervous system, chronic poisoning mainly acts on hematopoietic tissues and the nervous system, and symptoms such as nausea, headache, dizziness and the like can be caused if the acute poisoning is contacted with a large concentration for a long time.

Therefore, effective treatment methods for groundwater remediation are needed. For example, the utility model with publication number CN212924621U discloses a device for treating organic pollutants in underground water based on hydraulic control conditions, which comprises an extraction system arranged near the center of a polluted feather, wherein the system extracts underground polluted water, preliminarily purifies the underground polluted water through an integrated facility for water treatment on the ground, and stores the underground polluted water in a reservoir; a reinjection well on the periphery of the pumping well reinjects water in the reservoir into the underground aquifer; the organic pollutant treatment system comprises a closed chemical oxidation wall and a floating oil adsorption wall, wherein the floating oil adsorption wall is arranged near an underground water line and used for adsorbing light organic pollutants, the chemical oxidation wall is arranged in a water-bearing layer and is positioned on the inner side of the floating oil adsorption wall and used for oxidizing partial organic pollutants dissolved in underground water, the scheme is used for extracting through the middle part and recharging around to accelerate underground water circulation, the organic pollutants in the underground water are comprehensively treated, and the quality of the underground water is improved. Also, for example, the utility model patent publication No. CN209113628U discloses a high concentration organic matter contaminated groundwater pumping treatment system, the contaminated groundwater pumping pump pumps the contaminated groundwater out of the contaminated groundwater well and delivers it to the inlet of the combined tower of countercurrent stripping and chemical mixing, then the contaminated groundwater becomes water drops through multiple layers of sieve plates and naturally falls to meet the hot air blown out by the blower, the hot air blows out most of volatile/semi-volatile contaminated organics in the contaminated groundwater and enters the tail gas treatment device, the water drops of the contaminated groundwater continuing to fall meets and mixes with the mist repairing chemical sprayed from the mist spraying device of repairing chemical, so that part of the contaminants carried in the water drops of contaminated groundwater can be completely removed, and finally the groundwater is recharged into the ground through the treated groundwater recharging well. The utility model discloses equipment operation is simple, utilizes solar energy clean energy for blowing off the air heating, and the increase blows off efficiency, and vaporific restoration medicament mixes with the contact of water droplet form contaminated water, promotes the medicament treatment effect.

However, one technology is usually adopted for traditional remediation of organically-polluted groundwater, the effect is usually poor for pollution caused by persistent organic matters, petroleum hydrocarbons and the like, and the remediation target is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to above-mentioned prior art, the utility model provides a hydrocarbon organic pollution groundwater integrated processing system, the purpose is usually not good to pollution common effect such as persistent organic matter and petroleum hydrocarbon in order to solve single sewage treatment technique, to the not good technical problem of groundwater repair effect.

The utility model provides a hydrocarbon organic pollution groundwater integrated processing system, concrete technical scheme is as follows:

hydrocarbon organic pollution groundwater integrated processing system, including the sewage treatment module, the sewage treatment module includes equalizing basin, air supporting pond, fenton reaction tank, sedimentation tank and middle pond, the equalizing basin is connected the air supporting pond, the air supporting pond is connected the fenton reaction tank, the fenton reaction tank is connected the sedimentation tank, the sedimentation tank is connected middle pond, middle pond is connected through quartz sand filter and active carbon filter and is discharged the pond.

The floating tank is used for separating suspended matters from sewage and is divided into a dissolved air cavity and a scum separation cavity, the tops of the dissolved air cavity and the scum separation cavity are communicated, the dissolved air cavity is connected with a dissolved air water pump through a water pipe, and an air dispersing impeller is arranged in the scum separation cavity.

The Fenton reaction tank is used for firstly adjusting pH and then putting an oxidizing agent into the sewage and enabling the sewage to generate strong oxidation reaction, and the Fenton reaction tank is divided into a first pH adjusting cavity and a reaction cavity communicated with the top from the water inlet direction. The reaction cavity can also be divided into a ferrous reaction cavity and a hydrogen peroxide reaction cavity.

The sedimentation tank is used for firstly adjusting pH and then adding a coagulant and a polymeric flocculant into the sewage to coagulate and flocculate and precipitate small sewage particles, and the sedimentation tank is sequentially divided into a second pH adjusting cavity, a coagulation cavity and a sedimentation cavity with communicated tops from the water inlet direction. The coagulation chamber can also be divided into a coagulation chamber and a flocculation chamber.

The middle water tank is used for adjusting the pH value of the sewage.

In certain embodiments, the wastewater treatment module further comprises a catch basin in communication with the conditioning basin via a catch lift pump. The collecting tank is used for collecting polluted underground water, and sewage in the collecting tank is pumped into the regulating tank through the water collecting lift pump. The backwashing water outlet of the quartz sand filter and the backwashing water outlet of the activated carbon filter are communicated with the water collecting tank, namely, the backwashing effluent of the sand filter and the carbon filter can be discharged into the water collecting tank.

In certain embodiments, the adjusting tank is divided into an adjusting tank A and an adjusting tank B which are communicated at the bottom, and the adjusting tank B is communicated with the air flotation tank through an adjusting lift pump. The adjusting tank A and the adjusting tank B are communicated by adopting a pipeline at the bottom of the tank body and are used for adjusting water storage according to the liquid levels of the following tank bodies through the adjusting tank A and the adjusting tank B.

In some embodiments, the sewage treatment module further comprises an aeration fan, and the aeration fan is communicated with the adjusting tank, the air flotation tank, the fenton reaction tank, the sedimentation tank, the intermediate water tank and the discharge water tank through air pipes respectively. The aeration fan is used for improving the dissolved oxygen of each tank body.

In certain embodiments, the wastewater treatment module further comprises a Parshall metering tank, and the drain basin is connected to the Parshall metering tank. The Parshall metering tank is used for metering water quantity and then automatically discharging the water quantity into a sewage pipe network.

In certain embodiments, the device further comprises a sludge treatment module, wherein the sludge treatment module comprises a sludge tank, the sludge tank is connected with the air flotation tank, the sludge tank is also connected with a plate-and-frame filter press, and a filtrate outlet of the plate-and-frame filter press is connected with the adjusting tank. The filter pressing of the plate-and-frame filter press can also be sent back to the regulating tank for recycling treatment, and the filter-pressed mud cakes are transported outside.

In certain embodiments, the pharmaceutical system further comprises a dosing module comprising a PAM + tank, a sodium hydroxide tank, a hydrogen peroxide tank, a ferrous tank, a sulfuric acid tank, a PAM-tank, and a PAC tank, wherein the PAM + tank is in communication with the floatation tank, the sodium hydroxide tank is in communication with the sedimentation tank, the hydrogen peroxide tank is in communication with the fenton reaction tank, the ferrous tank is in communication with the fenton reaction tank, the sulfuric acid tank is in communication with the fenton reaction tank and the intermediate water tank, respectively, the PAM-tank is in communication with the sedimentation tank, and the PAC tank is in communication with the floatation tank and the sedimentation tank, respectively. The sodium hydroxide tank and the sulfuric acid tank are used for adding medicines to the tank body needing pH adjustment, the ferrous tank and the sulfuric acid tank are used for adding medicines to the tank body needing a strong oxidant, and the PAM + tank, the PAM-tank and the PAC tank are used for adding medicines to the tank body needing flocculation and coagulation.

The utility model discloses following beneficial effect has: the utility model provides a hydrocarbon organic pollution groundwater integrated processing system, converge groundwater equalizing basin, introduce the air supporting pond through the equalizing basin water level with water, the air supporting pond is used for separating the suspended solid in the groundwater, dross after the separation gets into sludge treatment module, waste water after the air supporting is handled gets into the fenton reaction tank, the fenton reaction tank is with the macromolecule, the material that is difficult to biodegradable turns into the inorganic matter, waste water after the fenton reaction tank is handled flows into the sedimentation tank, make the sewage tiny particle mutually condense into the large granule, quick solid-liquid separation that carries on in the sedimentation tank, sewage after the sedimentation tank is handled flows to middle pond and carries out the pH regulation back, the suspended solid is got rid of to the rethread quartz sand filter, again through active carbon filter advanced treatment, get rid of aquatic surplus trace pollutant, guarantee system goes out water quality of water stable up to standard, discharge through the drainage pond. The utility model discloses a multiple cell body realizes adopting multiple restoration technique combination of preliminary treatment, advanced oxidation, biochemical treatment to organic pollution groundwater, promotes the restoration effect to organic pollution groundwater.

Drawings

FIG. 1 is a schematic diagram of the framework structure of the comprehensive treatment system for organic contaminated groundwater of hydrocarbons of the present invention;

FIG. 2 is a schematic plan view of the comprehensive treatment system for organic contaminated groundwater of hydrocarbons according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1-2, the comprehensive treatment system for groundwater polluted by organic hydrocarbons comprises a sewage treatment module, a sludge treatment module and a chemical dosing module 3, wherein the sewage treatment module is used for water body treatment, the sludge treatment module is used for sludge treatment, and the chemical dosing module 3 is used for dosing chemicals into each tank body in the sewage treatment module.

The sewage treatment module comprises a water collecting tank, an adjusting tank 11, an air flotation tank 12, a Fenton reaction tank 13, a sedimentation tank 14 and an intermediate water tank 15. The adjusting tank 11 is divided into an adjusting tank A111 and an adjusting tank B112, the bottoms of which are communicated, and the adjusting tank B112 is communicated with the floatation tank 12 through an adjusting lift pump 113. The air flotation tank 12 is divided into a dissolved air cavity 121 and a scum separation cavity 122 which are communicated with each other at the tops, the dissolved air cavity 121 is connected with a dissolved air water pump 123 through a water pipe, an air dispersing impeller 124 is arranged in the scum separation cavity 122, the air dispersing impeller 124 directly and uniformly injects micro bubbles into sewage without dissolving air in advance through a complex air dissolving technology, so that the blocking phenomenon cannot occur, and the air flotation tank has the characteristics of reasonable design, convenience in operation, economy and reliability in operation and the like. The fenton reaction tank 13 is divided into a first pH adjusting chamber 131 and a reaction chamber which are communicated with each other at the top in the water inlet direction, and the reaction chamber is further divided into a ferrous iron reaction chamber 132 and a hydrogen peroxide reaction chamber 133. The sedimentation tank 14 is divided into a second pH adjusting chamber 141, a coagulation chamber 142, a flocculation chamber 143 and a sedimentation chamber 144 which are communicated with each other at the top in sequence from the water inlet direction. The catch basin passes through catchment elevator pump and equalizing basin A111 intercommunication, and equalizing basin B112 connects air supporting pond 12 through adjusting elevator pump 113, and Fenton reaction tank 13 is connected to air supporting pond 12, and sedimentation tank 14 is connected to Fenton reaction tank 13, and sedimentation tank 15 in the middle of sedimentation tank 14 is connected, and middle pond 15 is connected through quartz sand filter 16 and active carbon filter 17 and is discharged pond 18. The drain tank 18 is also connected to a Parshall metering tank 19. The backwashing water outlet of the quartz sand filter 16 and the backwashing water outlet of the activated carbon filter 17 are communicated with the water collecting tank.

The sludge treatment module comprises a sludge tank 21, the sludge tank 21 is connected with the air flotation tank 12, the sludge tank 21 is also connected with a plate-and-frame filter press 22, and the filtrate outlet of the plate-and-frame filter press 22 is connected with the adjusting tank 11. The filter pressing of the plate-and-frame filter press 22 can also be sent back to the regulating tank 11 for recycling treatment, and the filter-pressed mud cake is transported outside.

The dosing module 3 comprises a PAM + tank 31, a sodium hydroxide tank 32, a hydrogen peroxide tank 33, a ferrous iron tank 34, a sulfuric acid tank 35, a PAM-tank 36 and a PAC tank 37, wherein the PAM + tank 31 is communicated with a dissolved air cavity 121 of the air flotation tank 12, the sodium hydroxide tank 32 is communicated with a second pH adjusting cavity 141 of the sedimentation tank 14, the hydrogen peroxide tank 33 is communicated with a hydrogen peroxide reaction cavity 133 of the fenton reaction tank 13, the ferrous iron tank 34 is communicated with a ferrous iron reaction cavity 132 of the fenton reaction tank 13, the sulfuric acid tank 35 is respectively communicated with a first pH adjusting cavity 131 and a middle water tank 15 of the fenton reaction tank 13, the PAM-tank 36 is communicated with a flocculation cavity 143 of the sedimentation tank 14, and the PAC tank 37 is respectively communicated with the dissolved air cavity 121 of the air flotation tank 12 and a coagulation cavity 142 of the sedimentation tank 14. The sodium hydroxide tank 32 and the sulfuric acid tank 35 are used for adding medicines to the tank body needing pH adjustment, the ferrous iron tank 34 and the sulfuric acid tank 35 are used for adding medicines to the tank body needing a strong oxidant, and the PAM + tank 31, the PAM-tank 36 and the PAC tank 37 are used for adding medicines to the tank body needing flocculation and coagulation. The air flotation tank 12 for putting the medicine, the Fenton reaction tank 13 and the sedimentation tank 14 are internally provided with a stirrer (the dissolved air cavity 121, the first pH adjusting cavity 131, the hydrogen peroxide reaction cavity 133, the ferrous iron reaction cavity 132, the second pH adjusting cavity 141, the flocculation cavity 143 and the coagulation cavity 142). Automatic dispensing machines are arranged in the PAM + tank 31, the sodium hydroxide tank 32, the hydrogen peroxide tank 33, the ferrous iron tank 34, the sulfuric acid tank 35, the PAM-tank 36 and the PAC tank 37.

In summary, the general workflow of the comprehensive treatment system for groundwater polluted by hydrocarbon organic compounds in this embodiment is as follows:

hydrocarbon organic polluted underground water enters the regulating tank 11 through the lifting pump, the regulating lifting pump 113 lifts the wastewater to the air floatation tank 12, the air floatation tank 12 is designed for removing grease and suspended solids in industrial and municipal sewage, and micro bubbles are directly and uniformly injected into the wastewater through the specially designed air dispersing impeller 124. Scum generated by air floatation enters a sludge tank 21, wastewater after air floatation treatment enters a Fenton reaction tank 13, sulfuric acid is added into a first pH adjusting cavity 131 to control the pH value of the wastewater to be 3-4, then ferrous sulfate and hydrogen peroxide are added into the wastewater overflowing into the reaction cavity to carry out Fenton reaction, and under the action of a strong oxidant, macromolecular and difficultly biodegradable substances are converted into inorganic substances. Liquid caustic soda is added into the first pH adjusting cavity 131 to control the pH value of the wastewater to be 9.5-10 after Fenton oxidation, so that various heavy metal ions are fully reacted and converted into hydroxide precipitates, and then coagulant PAC and polymeric flocculant PAM are added into the coagulation cavity 142 and the flocculation cavity 143 respectively to enable small particles to be mutually coagulated into large particles, so that solid-liquid separation is rapidly carried out in the inclined tube sedimentation tank 14. The effluent of the sedimentation tank 14 flows into an intermediate water tank 15, sulfuric acid is added, the pH value of the wastewater is controlled to be 6.5-8.5, suspended matters are removed through sand filtration, the effluent is subjected to advanced treatment through an activated carbon filter 17, residual trace pollutants in the water are removed, the stability of the effluent quality of the system is guaranteed to reach the standard, and the effluent is monitored by a biotoxicity early warning instrument, measured by a Parshall metering tank 19, and then automatically flows into a sewage pipe network. When the quality of the effluent fluctuates, the effluent returns to the regulating tank 11 for retreatment.

The above-mentioned only the utility model discloses preferred feasible embodiment is not right the utility model discloses a restriction, the utility model discloses also not be limited to the above-mentioned example, technical field's technical personnel the utility model discloses an in the essential scope, change, modification, interpolation or replacement made also should belong to the protection scope of the utility model.

Claims (6)

1. The comprehensive treatment system for the organic polluted underground water is characterized by comprising a sewage treatment module and a sludge treatment module, wherein the sewage treatment module comprises an adjusting tank, an air flotation tank, a Fenton reaction tank, a sedimentation tank and an intermediate water tank, the air flotation tank is used for adding coagulant and flocculant into the sewage, and separating the small sewage particles into suspended matters through coagulation and flocculation, the Fenton reaction tank is used for adjusting pH firstly, then putting oxidant into the sewage and enabling the sewage to generate strong oxidation reaction, the sedimentation tank is used for adjusting pH firstly and then adding coagulant and flocculant into the sewage, so that the small sewage particles are coagulated, flocculated and precipitated, and the intermediate water tank is used for adjusting the pH of the sewage; the equalizing basin is connected the air supporting pond, the air supporting pond is connected the fenton reaction tank, the fenton reaction tank is connected the sedimentation tank, the sedimentation tank is connected middle pond, middle pond is connected through quartz sand filter and active carbon filter and is discharged the pond, sludge treatment module with the air supporting pond is connected.

2. The comprehensive treatment system for organic polluted groundwater according to claim 1, wherein the sewage treatment module further comprises a water collecting tank, and the water collecting tank is communicated with the regulating tank through a water collecting lift pump.

3. The comprehensive treatment system for organic polluted groundwater according to claim 1, wherein the regulating tank is divided into a regulating tank A and a regulating tank B which are communicated at the bottom, and the regulating tank B is communicated with the air floatation tank through a regulating lift pump.

4. The integrated organic contaminated groundwater processing system according to claim 1, wherein the wastewater processing module further comprises a Parshall metering tank, and the drainage basin is connected to the Parshall metering tank.

5. The comprehensive treatment system for organic polluted groundwater according to claim 1, wherein the sludge treatment module comprises a sludge tank, the sludge tank is connected with the air flotation tank, the sludge tank is further connected with a plate and frame filter press, a filtrate outlet of the plate and frame filter press is connected with the adjusting tank, and the sedimentation tank is communicated with the sludge tank through a sludge discharge pump.

6. The comprehensive treatment system for organically-polluted groundwater according to claim 1, further comprising a dosing module, wherein the dosing module comprises a PAM + tank, a sodium hydroxide tank, a hydrogen peroxide tank, a ferrous tank, a sulfuric acid tank, a PAM-tank and a PAC tank, the PAM + tank is communicated with the floatation tank, the sodium hydroxide tank is communicated with the sedimentation tank, the hydrogen peroxide tank is communicated with the Fenton reaction tank, the ferrous tank is communicated with the Fenton reaction tank, the sulfuric acid tank is communicated with the Fenton reaction tank and the intermediate water tank respectively, the PAM-tank is communicated with the sedimentation tank, and the PAC tank is communicated with the floatation tank and the sedimentation tank respectively.

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